カノジョいるけどとなりのおねーさんにしぼられたい

Description:
You have a girlfriend, but sex has been on the back burner for a long time. Then, you are seduced by the neighbor's sister who is a little bit seductive. You try your best to hold back from cumming for her, but she won't let you get away with it.
If such a sister were my girlfriend... I'll do something naughty to you every day..."
Screenshot: